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Segment, Other Supplemental Information and Concentrations - Regional Segment Revenue and Gross Margin for Company (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |
Revenue | $ 1,836 | $ 1,899 | $ 2,164
Total gross profit | 1,019 | 955 | 1,026
Total segment gross profit | 1,072 | 1,013 | 1,095
Stock-based compensation expense | 16 | 14 | 15
Acquisition, integration and reorganization-related costs | 14 | 11 | 5
Amortization of capitalized software costs | 23 | 33 | 49
Selling, general and administrative expenses | 669 | 618 | 666
Research and development expenses | 334 | 327 | 317
Income from operations | 16 | 10 | 43
Operating Segments | Americas |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 1,025 | 1,057 | 1,126
Total gross profit | 631 | 626 | 621
Operating Segments | EMEA |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 485 | 492 | 587
Total gross profit | 273 | 239 | 275
Operating Segments | APJ |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 326 | 350 | 451
Total gross profit | $ 168 | $ 148 | $ 199

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